She's revealing details of her very first threesome - with a guy and a girl - and it was NOT a great experience for her. In fact, 32-year-old Amber says she's having nightmares about what went down. Amber's the new host of the 'Loveline' podcast with Dr. Donaghue, and this was her first episode ... so she's starting with a bang. It'll be available for download early Thursday. (TMZ)